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accompanying figures. The antenne consist of about forty joints, 
the third and eighteen or nineteen following bipectinated, the terminal 
pectinations being shorter on the underside, and the remaining joints 
simply serrated. The head has two minute slender rudimental exarti- 
culate palpi, and the fore wings have the full complement of branches 
running to the margin of the wing, 7. e. twelve; of these, however, 
that (y) which represents the lower discoidal of Mr. Edw. Doubleday 
is united into a fork with the third branch of the median vein as in 
O. Saundersii. The fore tibia has a long flattened appendage 
slightly notched at the base, arising near its base. 
Oixrticus MacLear. (Plate XXXIV. fig. 3.) 
Of the male of O. MacLeaii, L. G., there is also a typical spe- 
cimen in the cabinet of the British Museum. 
In the fore wings of this species there are only ten terminal 
branches, the third branch of the subcostal and the upper discoidal 
being obsolete, and the lower discoidal (y) arises conjointly with the 
third branch of the median from the lower extremity of the discoidal 
cell. The fore legs are long and slender, with the fore tibiee simple. 
By the kindness of W. W. Saunders, Esq., I am also enabled to 
exhibit, describe, and figure several new species of these insects 
recently brought from New South Wales by Mr. W. Stephenson. 
The cases of several of the Australian species of these insects are 
figured by Mrs. Meredith in her ‘ Notes and Sketches of New South 
Wales,’ and noticed in the foliowing terms :—‘‘ Some of the insect 
architects here are most extraordinary creatures; but I grieve to 
say I know comparatively little about them, my chief acquaintance 
being with their deserted houses, of which I have several kinds ; some 
of these are formed of straight twigs, the sixth or eighth part of an 
inch thick, and from two to four inches long, placed side by side in 
a circular form and very strongly webbed together within, so that it 
is impossible to tear them asunder without breaking the twigs, the 
ends of which usually project beyond the closed portion of the cell, 
which is suspended by a strong web woven over the spray of a tree 
or shrub, so as to let it swing with the wind. I have sometimes seen 
a large white caterpillar inside an unfinished cell, and on one or two 
occasions have observed a bush or tree so full of these pendent berths 
as to give them the appearance of a good crop of some fruit or seed. 
How such a creature could cut off and carry to their destined place, 
pieces of twig four or five times its own weight, I cannot imagine ; 
that they were cut expressly for the purpose is evident, from the neat 
manner in which the ends are rounded off; they are left of uneven 
lengths and not webbed on the outside; which together with their 
being hung so as to wave with the leaves of the tree, seem all pre- 
cautions against discovery. Some are formed in the same manner 
of much smaller twigs, others are pointed bags of strong web, with 
small bits of stick fastened at intervals on the outside, and some are 
